Bug report #11713
Measure tool ellipsoid defaults to 'None/Planametric' regardless of previous ellipsoid selection
| Status: | Closed | ||
|---|---|---|---|
| Priority: | Severe/Regression | ||
| Assignee: | - | ||
| Category: | Projection Support | ||
| Affected QGIS version: | master | Regression?: | No |
| Operating System: | Easy fix?: | No | |
| Pull Request or Patch supplied: | No | Resolution: | duplicate |
| Crashes QGIS or corrupts data: | No | Copied to github as #: | 19951 |
Description
Using QGIS 2.6.0 Brighton, I want to overlay a shapefile (EPSG: 26910, Nad83 UTM10) over OpenLayers Google Satellite (EPSG: 3857, Pseudo Mercator), and reliably measure distances.
The process is to add the shapefile, then add Google Satellite. The project CRS switches to EPSG:3857, and the shapefile is correctly overlaid. The measure tool does not report correct distance - not surprising, since the CRS is 3857. I do not want to change the CRS because then imagery shifts unexpectedly. So, I change the measure tool ellipsoid in Project Properties to 'GRS 1980'. Hit 'OK' to return to map. The measure tool reports correct distance.
However, if I ever open Project Properties again, the measure tool ellipsoid has defaulted back to 'None/Planametric'. If I hit 'OK' to return to map, the measure tool now reports incorrect distance, presumably because the map plane is unprojected.
Related issues
Associated revisions
History
#1
Updated by Lene Fischer almost 10 years ago
I have just found the same error.
Starting to show my students the difference between calculating an area with planimetric /ellipsoide difference.
We use EPSG 25832 (UTM32 N EUREF 89)
In the Project properties the Measure tool are set to CRS ON and Ellipsoide None /Planimetric ??? Strange when I have choosen a CRS with an Ellipsoide
Then I change the Ellipsoide to WGS84 – Click on CRS – and sometimes it is set back to None or Clark 1866.
When I try to calculate an area – without any changes in the None /Planimetric – and secondly change the ellipsoide to WGS84 and recalculate – the area gets smaller!!!!!!!
This must be a blocker!!!
#2
Updated by Giovanni Manghi almost 10 years ago
- Affected QGIS version changed from 2.6.0 to master
- Target version set to Version 2.8
- Priority changed from Normal to Severe/Regression
- Status changed from Open to Feedback
- Category set to Projection Support
this ticket should be duplicate of #10392 that is alreasy a blocker. Please leave feedback.
#3
Updated by Lene Fischer almost 10 years ago
- Assignee set to Giovanni Manghi
Hi Giovanni,
I don´t understand the other ticket you refer to.
The problem is that all area calculation is incorrect. And that is a MAJOR issue. If we can´t trust calculated area values...
In my humble opinion, I feel this issue is so important that a bugfix and a version 2.6.2 is needed ASAP.
Regards
Lene Fischer
#4
Updated by Giovanni Manghi almost 10 years ago
- Assignee deleted (
Giovanni Manghi)
Hi Leme
Lene Fischer wrote:
Hi Giovanni,
I don´t understand the other ticket you refer to.The problem is that all area calculation is incorrect. And that is a MAJOR issue. If we can´t trust calculated area values...
In my humble opinion, I feel this issue is so important that a bugfix and a version 2.6.2 is needed ASAP.
it means that this ticket is, in my opinion, a duplicate of the issue described in #10392 and so it should be closed. #10392 is already a blocker, that means that it must be fixed in time for qgis 2.8 (I am not sure there is any plan for 2.6.2). Cheers!
#5
Updated by Nathan Woodrow almost 10 years ago
- Resolution set to duplicate
- Status changed from Feedback to Closed
This is a duplicate of #10392 so lets just keep that one open for now.
#6
Updated by Nathan Woodrow almost 10 years ago
As a side note: Does the ellipsoide picker even belong there. I would say something like that should be in the measure dialogs so you can change it on the fly while using it. Or is it normally a set once and leave it kind of thing?
#7
Updated by Jürgen Fischer about 6 years ago
- Related to Bug report #19902: Advanced Digitizing tool NOT aligned with measurement tool added